CN101621213A - False failure prevention circuit in emergency ballast - Google Patents
False failure prevention circuit in emergency ballast Download PDFInfo
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- CN101621213A CN101621213A CN200910159433A CN200910159433A CN101621213A CN 101621213 A CN101621213 A CN 101621213A CN 200910159433 A CN200910159433 A CN 200910159433A CN 200910159433 A CN200910159433 A CN 200910159433A CN 101621213 A CN101621213 A CN 101621213A
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- ballast
- output switch
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2853—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal power supply conditions
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2855—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The present invention relates to a false failure prevention circuit in an emergency ballast, a backup ballast used with a primary ballast for providing power to one or more lamps. The backup ballast includes an output switch and a delay circuit. The output switch has a first operating mode for connecting a primary power source via the primary ballast to a first set of the lamps and second operating mode for connecting a backup power source with a second set of the lamps. The output switch operates in the first operating mode when it is energized and in the second operating mode when said it is not energized. The delay circuit is adapted for connecting to the primary power source for receiving power therefrom. The delay circuit is connected to the output switch for energizing it while the power is being received and for a delay period thereafter. The delay circuit includes an energy-storage component for storing energy while the power is being received and discharging the stored energy when the power is not being received in order to energize the output switch for the delay period.
Description
Technical field
The present invention relates to the false failure prevention circuit in the emergency ballast.
Background technology
[0001] ballast provides electric power to lamp, and regulates electric current and/or the power that offers lamp.When lamp (for example fluorescent lamp) near finishing pot life or when interrupting, seeing that as ballast the resistance of lamp increases.The resistance that increases requires ballast to export more high voltage, so that keep passing to the electric current and the power of lamp.Therefore, along with resistance continues to increase, ballast produces very high voltage (for example surpass and exchange 500 volts voltage).The skilled worker that high voltage is changed old lamp to needs causes the danger of getting an electric shock and dying, because the voltage that increases has improved the risk that by him the earth is formed electric arc when the skilled worker attempts changing lamp.Therefore, some ballasts have been equipped with protective circuit (for example the lamp operating period finishes circuit), are provided for lamp so that prevent high pressure.Protective circuit is configured to detect the unexpected increase of output voltage and/or surpasses the output voltage of threshold value, stops ballast operation so that this is responded.These ballasts also have and are configured to detect the time of having changed lamp, and this is responded and restart the high pressure output of ballast, change lamp (the lamp operating period of for example resetting finishes circuit) so that light.
[0002] ballast can receive the electric power from multiple source.For example, the ballast system that is used for commercial mansion usually receives from civil power and from the electric power of storage battery.This ballast system comprises: main ballast provides electric power for lamp when ballast system operates in first operator scheme (for example main power mode); And storage battery power supply ballast (broadly being called " standby ballast "), when operating in second operator scheme (for example emergency electric power pattern), ballast system provides electric power for lamp.Ballast system can comprise the switching circuit of the operator scheme that is used to control ballast system.Specifically, switching circuit is configured to come operating ballast system with main power mode when civil power when ballast system provides electric power, and when civil power not when ballast system provides electric power with emergency electric power pattern operating ballast system.Correspondingly, when civil power when ballast system provides electric power, main ballast provides electric power by commercial power supply for lamp.When civil power stops when ballast system provides electric power (for example between turnoff time), standby ballast provides from the electric power of storage battery supply for lamp.
[0003] when ballast system exchanges between power supply, the variation of output voltage often takes place, make protective circuit unnecessarily stop the operation of ballast system thus.For example, switching circuit is generally by exchanging to the interruption that the emergency electric power pattern responds civil power from main power mode immediately.Therefore, standby ballast may suitably begin to provide electric power to lamp before the discharge at main ballast.The excessive output voltage that discharges from main ballast can make protective circuit stop the output of main ballast.
[0004] Fig. 1 is the sequential chart of conventional ballast system, and the response of the assembly of ballast system to power cut-off incident is shown.The main ballast of ballast system comprises the converter that becomes DC (direct voltage) voltage from AC (interchange) voltage transformation that civil power received.By filtering capacitor dc voltage is passed to inverter then.Inverter is transformed into dc voltage the high-frequency AC electric power that is used to offer lamp.After civil power stops and filtering capacitor when dissipating, the voltage of filtering capacitor two ends (being the DC bus) may exist.Correspondingly, shown in the sequential chart of Fig. 1, after switching circuit has begun to come the operating ballast system with the emergency electric power pattern (for example after switching circuit cuts out), inverter keeps connecting and is expressed as t
DTime period.Inverter is at t
DBut the excess voltage trigger protection circuit of being exported during this time (for example the lamp operating period of main ballast finishes circuit) detects lamp mistakenly interrupts or is in its effective life end, and closes the output of main ballast.Therefore, when via civil power ballast system being recovered electric power, ballast system fails to provide electric power to lamp, because the output of main ballast is closed.
Summary of the invention
[0005] embodiments of the invention for ballast system provide wherein main power source just powering with the main power mode of exciter and wherein stand-by power supply just powering with the reliable transformation between the emergency electric power pattern of exciter.Specifically, embodiments of the invention postpone the transformation between main power mode and the emergency electric power, make protective circuit unnecessarily not stop the operation of ballast system.
[0006] provides content of the present invention so that introduce the selection of notion in simplified form, in embodiment, further describe below.Content of the present invention is not to determine the key feature or the essential characteristic of the theme of prescription, neither be as the scope of the theme that helps definite prescription.
[0007] the further feature part will be very tangible, and part proposes hereinafter.
Description of drawings
[0008] Fig. 1 is the sequential chart of conventional ballast system, and the operation of the assembly of conventional ballast system during the power cut-off incident is shown.
[0009] Fig. 2 is according to one embodiment of present invention, has a block diagram of demonstration ballast system of the standby ballast of band delay circuit.
[0010] Fig. 3 A is part block diagram, the part schematic diagram that illustrates according to one embodiment of present invention, operates in the delay circuit in the main power mode.
[0011] Fig. 3 B is part block diagram, the part schematic diagram that illustrates according to one embodiment of present invention, operates in the delay circuit in the delayed mode.
[0012] Fig. 4 is the sequential chart of ballast system according to an embodiment of the invention, and the operation of the assembly of conventional ballast system during the power cut-off incident is shown.
[0013] Fig. 5 is according to one embodiment of present invention, has a block diagram of demonstration ballast system of the standby ballast of band delay circuit.
[0014] the corresponding reference label is represented corresponding components in the accompanying drawings.
Embodiment
[0015] embodiments of the invention comprise the standby ballast that uses in conjunction with the main ballast with protective circuit related with it.Standby ballast has delay circuit, to avoid the faulty operation of protective circuit.Specifically, delay circuit makes standby ballast postpone to provide electric power to lamp in outage (for example fault, interruption) afterwards, and winner's ballast correctly cuts out if having time.
[0016] to illustrate be according to one embodiment of present invention to Fig. 2, have a demonstration ballast system 200 of main ballast 202 and standby ballast 204.Ballast system 200 is used with main power source 206 (for example AC power) and stand-by power supply 208 (for example DC power supply), so that be provided for the electric power of exciting light source (for example lamp 1201, lamp 2212).Main power source 206 and/or stand-by power supply 208 can comprise one or more voltage sources.In one example, main power source 206 is civil power (for example 120Vrms AC, 60Hz), and stand-by power supply 208 is (for example 6 volts of cadmium-nickel storage cells of high temperature).In the case without departing from the scope of the present invention, other power supply can be used for main power source 206 and stand-by power supply 208.
[0017] ballast system 200 has three kinds of operator schemes: (1) main power mode; (2) delayed mode; And (3) emergency electric power pattern.Ballast system 200 is configured to operate in main power mode when 200 power supplies of main power source 206 forward ballast systems.In main power mode, main ballast 202 receives the electric power of main power source 206 supplies, and provides electric power to first group of lamp 210,212 (being one or more lamps) again, to be used to encourage first group of lamp 210,212.According to shown in 200, the first groups of lamps of ballast system 210,212 comprise first lamp 210 and second lamp 212.Ballast system 200 is configured to after main power source 206 outage during not to ballast system 200 power supplies immediately to operate certain of section with delayed mode time of delay.In delayed mode, main ballast 202 cuts out.Any dump power in the main ballast 202 is discharged into first group of lamp 210,212, to be used to encourage first group of lamp 210,212.Ballast system 200 be configured to when main power source 206 described time of delay during not to ballast system 200 power supplies after the section immediate operation in the emergency electric power pattern.In the emergency electric power pattern, stand-by power supply 208 is powered to the standby ballast 204 that receives electric power from main power source 206, and provides electric power to second group of lamp 210 (being one or more lamps) again, to be used to encourage second group of lamp 210.According to shown in 200, the second groups of lamps 210 of ballast system comprise first lamp 210.
[0018] standby ballast 204 configurations are used for receiving electric power from main power source 206 and stand-by power supply 208 alternative ground.Specifically, standby ballast 204 comprises one or more input terminals that can be connected to main power source 206, can be connected to one or more input terminals of stand-by power supply 208 and can be connected to earthy earth terminal.In one embodiment, main power source 206 comprises first voltage source (for example 120 volts of AC) and second voltage source (for example 277 volts of AC).Standby ballast 204 comprises first input end that can be connected to first voltage source, the 3rd input terminal that can be connected to second input terminal of second voltage source and can be connected to stand-by power supply 208.Standby ballast 204 is connected with any of first voltage source or second voltage source in operation, and is connected with stand-by power supply 208.Therefore, standby ballast 204 can be selectively be connected with any and standby battery of standard commercial voltage (i.e. 277 volts of AC) or standardized house voltage (i.e. 120 volts of AC).
[0019] main ballast 202 is fit to be connected with standby ballast 204, so that receive the AC electric power of main power source 206 supplies.Main ballast 202 comprises AC-DC converter 220, filtering capacitor 222 (for example high value electrolytic capacitor) and is used for the series connection DC-AC inverter 224 that an AC power converter from main power source 206 supplies becomes to be used to offer the high-frequency AC electric power of first group of lamp 210,212.Standby ballast 204 comprises lamp drive circuit 230, and it is fit to be connected with stand-by power supply 208, so that receive DC electric power by stand-by power supply 208 supplies, and the high-frequency AC electric power that the DC power converter is become to be used to offer second group of lamp 210.As described in every kind of operator scheme of following reference, the output switch circuit 238 that standby ballast 204 comprises rectifier 232, input switching circuit 234, delay circuit 236 and is used to control the operator scheme of ballast system 200.
[0020] in general, rectifier 232 is fit to be connected with main power source 206, so that receive the AC electric power of automatic power supply 206, and the AC power converter is become DC electric power.Input switch, lamp drive with delay circuit 236 and respectively are connected with main power source 206 via rectifier 232, and correspondingly operate as the function of the main power source 206 of powering to ballast system 200.Input switching circuit 234 suitable (for example via input terminal) selectively is connected main power source 206 with main ballast 202, make when 200 power supplies of main power source 206 forward ballast systems, comes the electric power of automatic power supply 206 can be transmitted to main ballast 202.Delay circuit 236 is connected with output switch circuit 238, is used for when delay circuit 236 during just from main power source 206 (via rectifier 232) received energy and do not have to receive a section excitation time of delay output switch circuit 238 of the energy of automatic power supply 206 at delay circuit 236.Output switch circuit 238 is suitable for when the output switch is energized main ballast 202 being connected with first group of lamp 210,212 and when the output switch is unexcited the lamp driving being connected with second group of lamp 210.The applicant notices that scope of the present invention does not need all to list assembly.In addition, in the case without departing from the scope of the present invention, can use the assembly of other structure or type.
[0021]
Main power mode
[0022] as mentioned above, when ballast system 200 just when main power source 206 receives electric power, ballast system 200 operates in main power mode.In principal mode, input switch receives AC electric power via an input terminal from main power source 206, and rectifier 232 receives AC electric power via another input terminal from main power source 206.Rectifier 232 becomes DC electric power with the AC power converter that is received.When main power source 206 is just being supplied AC electric power, DC electric power is offered lamp drive circuit 230, so that forbidding lamp drive circuit 230.When main power source 206 forward ballast systems 200 supply AC electric power, also DC electric power can be offered DC stand-by power supply 208, so that to 208 chargings of DC stand-by power supply.When main power source 206 forward ballast systems 200 supply AC electric power, DC electric power is offered input switching circuit 234, delay circuit 236 and output switch circuit 238, so that encourage those assemblies.
[0023] specifically, rectifier 232 provides converted DC electric power to input switching circuit 234.Input switching circuit 234 receives the excitation input switching circuit 234 DC electric power of (broadly being called " with first pattern operation input switch ").When input switching circuit 234 is in when being energized state, input switching circuit 234 is transmitted to main ballast 202 with the AC electric power that input switching circuit 234 is received from main power source 206.
[0024] main ballast 202 receives the electric power that main power source 206 is supplied, and it is transformed into high-frequency AC electric power.Specifically, converter 220 is transformed into dc voltage with the AC electric power (being voltage) that is received.The demonstration converter comprises one or more as downconverter: boost, step-down (buck), buck/boost power factor correction and PPFC (Passive Power Factor Correction).By filtering capacitor 222 dc voltage is passed to inverter 224 then.In one example, filtering capacitor 222 is high value electrolytic capacitors, and it preserves electric charge so that relax the fluctuation of dc voltage.Inverter 224 is transformed into high-frequency AC electric power with dc voltage.When excitation output switch circuit 238, high-frequency AC electric power is offered first group of lamp 210,212.
[0025] rectifier 232 also offers converted DC electric power the delay circuit 236 that receives DC electric power.Delay circuit 236 comprises stored energy assembly (for example capacitor, little storage battery), the part of its storage DC electric power that receives.Delay circuit 236 is transmitted to output switch circuit 238 with the remainder of reception DC electric power.Fig. 3 A illustrates according to one embodiment of present invention, operates in the example delay circuit 236 of main power mode.Shown in delay circuit 236 comprise diode 304 (for example high speed diode, as the 1N4148 diode), resistor 306 (for example 10 ohm) and capacitor 302 (for example 1000 microfarads).Resistor 306 and capacitor 302 series connection, and common in parallel with output switch circuit 238.Diode 304 has plus end 310 that is electrically connected with rectifier 232 and the negative terminal 312 that is electrically connected with resistor 306 and output switch circuit 238.The applicant notices that in the case without departing from the scope of the present invention, delay circuit 236 can comprise additional or alternative assembly.For example, in one embodiment, switch module, be used for replacing diode 304 as transistor.In another example, storage battery is used for replacing capacitor 302.In another example, another resistor (not shown) is connected with diode 304 between diode 304 and rectifier 232, so that operate, and when capacitor 302 discharge, provide time constant (below discuss) as surge current (current in rush) limiter.
[0026] delay circuit 236 shown in the basis, diode 304 receives the DC electric power that rectifiers 232 are provided.Specifically, diode 304 is transmitted to negative terminal 312 with the DC electric power (for example being expressed as the DC electric current of " I ") that is received from plus end 310.Then, the DC electric current I is divided into and is expressed as " I
1" first current signal (broadly being called " a DC electric power signal ") and be expressed as " I
2" second current signal (broadly being called " the 2nd DC electric power signal ").The first current signal I
1Through resistor 306 and capacitor 302.The first current signal I
1Through capacitor 302 time, capacitor 302 is charged.When delay circuit 236 was just receiving the DC electric current, resistor 306 stoped capacitor 302 discharges.With the second current signal I
2Offer output switch circuit 238, be used to encourage output switch circuit 238.
[0027] output switch circuit 238 receives the excitation output switch circuits 238 DC electric power of (broadly being called " with first pattern operation output switch circuit 238 ") (the second current signal I for example
2).When output switch circuit 238 is in when being energized state, output switch circuit 238 is electrically connected main ballast 202 with first group of lamp 210,212.More particularly, when output switch circuit 238 is in when being energized state, output switch circuit 238 is transmitted to first group of lamp 210,212 with the high-frequency AC electric power that main ballast 202 is produced from inverter 224, to be used to encourage first group of lamp 210,212.
[0028]
Delayed mode
[0029] as mentioned above, the outage of ballast system 200 when main power source 206 does not have to ballast system 200 power supplies is afterwards immediately with delayed mode operating delay time section.In delayed mode, delay circuit 236 provides electric power for output switch circuit 238.Correspondingly, the output switch continues main ballast 202 is electrically connected with first group of lamp 210,212, thereby allows main ballast 202 correctly to release energy to lamp group 210,212, makes protective circuit not trigger.
[0030] specifically, when main power source 206 stopped to ballast system 200 power supplies, input switch no longer received the AC electric power that is used to offer main ballast 202.Correspondingly, do not provide electric power to main ballast 202.In addition, when main power source 206 stopped to ballast system 200 power supplies, rectifier 232 no longer was used to encourage input switching circuit 234, encourages the electric power of exporting switches and forbidding lamp drive circuit 230 via delay circuit 236 from main power source 206 receptions.
[0031] therefore, when main power source 206 not when ballast system 200 provides electric power input switching circuit 234 be de-energized (broadly being called " with second pattern operation "), simultaneously.In de-energized state, input switching circuit 234 is arranged such that main power source 206 is electrically connected with main power source 206 disconnections.
[0032] response main power source 206 stops to provide electric power to delay circuit 236 (for example via rectifier 232), delay circuit 236 is to output switch circuit 238 energy that memory module stores that releases energy, and makes output switch circuit 238 continue operation certain of section to be energized state time of delay.Fig. 3 B illustrates according to one embodiment of present invention, operates in the example delay circuit 236 of delayed mode.Capacitor 302 releases energy to output switch circuit 238 by resistor 306.The path that diode 304 control releases energy makes it flow to output switch circuit 238 rather than refluxes towards rectifier 232.
[0033] output switch circuit 238 receives the energy of the release that continues excitation output switch circuit 238.As mentioned above, when output switch circuit 238 is in when being energized state, output switch circuit 238 is electrically connected main ballast 202 with first group of lamp 210,212.Therefore, in the time of delay section, main ballast 202 correctly discharges, because output switch circuit 238 is transmitted to first group of lamp 210,212 by inverter 224 with remaining any electric power in the main ballast 202, to be used to encourage first group of lamp 210,212.For example, the energy that filtering capacitor 222 is stored during the main power mode can be transformed into high-frequency AC electric power by inverter 224, offers first group of lamp 210,212 then.
[0034] because the time quantum that time of delay, segment base discharged in delay circuit 236 makes that time of delay, section provided the adequate time amount for main ballast 202 discharges so the assembly of delay circuit 236 may be selected to.For shown in delay circuit (Fig. 3 A, Fig. 3 B), the value of capacitor 302 and resistor 306 can be selected according to following relationship:
V (t)=VCe
-t/RC, wherein
V (t) is illustrated in the required voltage of special time t;
Vc represents the capacitor steady state voltage; And
e
-t/RCThe expression discharge rate.
In one embodiment, main ballast 202 is the quick startup electric ballasts that are used for fluorescent lamp.Section time of delay between about 100 milliseconds and 200 milliseconds allows main ballast 202 correctly to discharge.In one example, time of delay, section provided by having as the capacitor 302 of 1000 micro farad capacitor with as the delay circuit 236 of the resistor 306 of 10 ohmic resistors.Diode 304, can be used with these specific components, so that make the capacitor 302 can be only by output switch circuit 238 discharges as 14148 diodes.
[0035] according to illustrated embodiment, during delayed mode, lamp drive circuit 230 extracts electric power from stand-by power supply 208, because it does not receive DC electric power from rectifier 232.But the electric power that stand-by power supply 208 is supplied does not offer second group of lamp 210 in time of delay during the section, because output switch circuit 238 continues to operate in the state of being energized, thereby main ballast 202 is connected with first group of lamp 210,212.
[0036]
The emergency electric power pattern
[0037] as mentioned above, the time of delay section afterwards immediate operation of ballast system 200 when main power source 206 does not have to ballast system 200 power supplies is in the emergency electric power pattern.In other words, when delay circuit 236 finish its discharge, when making output switch circuit 238 no longer from delay circuit 236 received energies, ballast system 200 begins to operate in the emergency electric power pattern.Ballast system 200 is configured to continue to operate in the emergency electric power pattern, becomes available (that is, to ballast system 200 power supplies) up to main power source 206.
[0038] in contingency mode, input switch does not receive AC electric power from main power source 206, does not therefore provide electric power to main ballast 202.In addition, because main power source 206 is unavailable, so main power source 206 is not provided for encouraging input switching circuit 234, via the electric power of delay circuit 236 excitation output switch circuits 238 and forbidding lamp drive circuit 230.Correspondingly, input switching circuit 238 remains de-energisation, and therefore main ballast 202 keeps being connected with main power source 206 disconnections.
[0039] lamp drive circuit 230 is activated, and stand-by power supply 208 provides electric power to ballast system 200.Lamp drive circuit 230 extracts electric power from stand-by power supply 208, because it does not receive DC electric power from rectifier 232.Because output switch circuit 238 is no longer from delay circuit 236 received energies, so output switch circuit 238 is de-energized (broadly being called " with second state of operation ").Output switch circuit 238 remains de-energisation, becomes available up to main power source 206.In de-energized state, output switch circuit 238 is connected lamp drive circuit 230 with second group of lamp 210.Therefore, output switch circuit 238 is transmitted to second group of lamp 210 with the electric power that stand-by power supply 208 is provided from lamp drive circuit 230.
[0040] Fig. 4 is the sequential chart that the operation of assembly during three kinds of operator schemes is shown.Begin and in the time period that t2 finishes, ballast system 200 operates in main power mode at t1, because main power source 206 is connected (that is, to ballast system 200 power supplies).The AC electric power that comes automatic power supply 206 is offered main ballast 202.Therefore, main ballast inverter 224 shortly after that is switched on (that is, be energized, begin that institute is received power converter and become high-frequency AC electric power, be used to offer first group of lamp 210,212).When main power source 206 is connected, stand-by power supply 208 chargings (promptly connecting), and lamp drive circuit 230 disabled (promptly disconnecting).Delay circuit 236 is from main power source 206 received energies, and stores the energy in the memory module 302, and with energy conduction to output switch circuit 238.Therefore, when main power source 206 was connected, output switch circuit 238 was energized.Specifically, main ballast inverter 224 is connected with first group of lamp 210,212 in operation, makes and encourages first group of lamp 210,212 with high-frequency AC electric power.
[0041] begins and in the time period (" section time of delay ") that t3 finishes, ballast system 200 operates in the delayed mode at t2.Specifically, main power source 206 disconnects (that is, main power source 206 stops to provide electric power to ballast system 200, and main power source 206 becomes unavailable, cuts off the power supply) at t2.Therefore, stand-by power supply 208 no longer adopts and comes the electric power of automatic power supply 206 to charge, and lamp drive circuit 230 is activated.Even main power source 206 disconnects, the inverter 224 of main ballast 202 also remains connection, because the assembly of main ballast 202 still discharges.During the time of delay section, delay circuit 236 is released in the energy of storing in the time period t 1 to t2 to output switch circuit 238.Therefore, output switch circuit 238 remains during the section in time of delay and is energized, and winner's ballast 202 can be discharged, and do not have the trigger protection circuit.
[0042] after the time of delay section (after being time t 3), ballast system 200 operates in the emergency electric power pattern.Specifically, main power source 206 remains disconnection.Equally, stand-by power supply 208 does not have to adopt the electric power of automatic power supply 206 to charge, and lamp drive circuit 230 is activated.Main ballast inverter 224 is correctly cut off, because the assembly of main ballast 202 was discharged during the section in time of delay.Delay circuit 236 no longer encourages output switch circuit 238, because it does not receive electric power from main power source 206, and has discharged the energy of being stored in time of delay during the section.Therefore, output switch circuit 238 was de-energized after the section in time of delay.Specifically, lamp drive circuit 230 is connected with second group of lamp 210 in operation, makes the energy that adopts stand-by power supply 208 to be supplied encourage second group of lamp 210.Output switch circuit 238 remains de-energisation, connects up to main power source 206.
[0043] with reference to Fig. 2 and Fig. 5, those skilled in the art can know that input switching circuit 234,534 and output switch circuit 238,538 can dispose by various alternate ways.For example, ballast system 200 shown in Figure 2 has and the input switching circuit 234 of delay circuit 236 parallel connections and the output switch circuit 238 of connecting.Fig. 5 illustrate another the demonstration ballast system 500, wherein similar components shared to Fig. 2 in similar reference number.Ballast system 500 has input switching circuit 534, delay circuit 536 and the output switch circuit 538 of series connection.Therefore, when rectifier 532 when input switching circuit 534 provides DC electric power, input switching circuit 534 is transmitted to delay circuit 536 with DC electric power, delay circuit 536 is transmitted to output switch circuit 538 with DC electric power again.Therefore, similar to the ballast system 200 of Fig. 2, the DC electric power that rectifier 532 is provided is used to encourage input switching circuit 534, delay circuit 536 and output switch circuit 538.
[0044] operation or the execution sequence of the operation in the embodiments of the invention shown and described herein are optional, unless add explanation in addition.That is to say that operation can be carried out by any order, unless add explanation in addition, and embodiments of the invention can comprise additional or than operation still less disclosed herein.For example, consider before another operation, simultaneously or operation afterwards or carry out specific operation and fall within the scope aspect of the present invention.
[0045] embodiments of the invention can adopt computer executable instructions to realize.But computer executable instructions can be organized into one or more computer executive modules or module.Aspect of the present invention can adopt any amount of this class component or module and tissue to realize.For example, aspect of the present invention is not limited to shown in the accompanying drawing and specific computer-executable instructions as herein described or specific components or module.Other embodiments of the invention can comprise having than more or less functional various computing machine executable instruction shown and described herein or assembly.
[0046] introduce of the present invention aspect or during the element of embodiment, determiner " ", " being somebody's turn to do " and " described " are intended to represent to exist the one or more of element.Term " comprises ", " comprising " and " having " be intended to be included, and expresses possibility and have the add ons different with listing element.
[0047] described aspect of the present invention in detail, thereby will understand that modifications and changes are possible under the situation that does not deviate from the defined scope aspect of the present invention of claims.Owing under the situation that does not deviate from the scope aspect of the present invention, in above-mentioned structure, product and method, can carry out various changes, therefore estimate abovely to describe that institute comprises and all the elements shown in the drawings will be considered to illustrative rather than restrictive.
Claims (20)
1. one kind combines the standby ballast that is used for providing to one or more lamps electric power with main ballast, and described standby ballast comprises:
Output switch circuit, has first group first operator scheme that is used for main power source is electrically connected to via described main ballast described one or more lamps, and described output switch circuit has and is used for second group second operator scheme that be electrically connected of stand-by power supply with described one or more lamps, wherein, when described output switch circuit is energized, described output switch circuit is operated in described first operator scheme, and when described output switch circuit was unexcited, described output switch circuit was operated in described second operator scheme; And
Delay circuit, be suitable for being electrically connected to described main power source, to be used for receiving electric power from described main power source, described delay circuit is electrically connected to described output switch circuit, to be used for when receiving described electric power and to encourage described output switch circuit for after this section time of delay, wherein, described delay circuit comprises stored energy assembly, to be used for stored energy when receiving described electric power, and be used for when not receiving described electric power, discharging the energy of being stored so that for described time of delay section encourage described output switch circuit.
2. standby ballast as claimed in claim 1, also comprise: rectifier, be suitable for being electrically connected with described main power source, to be used for receiving electric power from described main power source, described rectifier is electrically connected with described delay circuit, and wherein, rectifier is transformed into direct current power with described alternating electromotive force when described electric power is being received, and described direct current power is offered described delay circuit, and wherein said delay circuit is suitable for being electrically connected with described main power source via described rectifier.
3. standby ballast as claimed in claim 1, wherein, described output switch circuit and the series connection of described delay circuit.
4. battery-driven ballast as claimed in claim 1, wherein, described stored energy assembly is a capacitor.
5. battery-driven ballast as claimed in claim 4, wherein, described delay circuit also comprises diode and resistor, described diode has the suitable plus end that is electrically connected with described main power source via rectifier, described diode has and described output switch and the negative terminal, described resistor and the described capacitors in series that are connected with described resistor.
6. battery-driven ballast as claimed in claim 1, wherein, described stored energy assembly is a storage battery.
7. battery-driven ballast as claimed in claim 1, wherein, described time of delay section between about 100 milliseconds and 200 milliseconds, described time of delay, section allowed described main ballast correctly to discharge.
8. battery-driven ballast as claimed in claim 1, wherein, described first group of lamp comprises first lamp, and described second group of lamp comprises described first lamp and second lamp.
9. method that is used for when the electric power that comes automatic power supply becomes unavailable one or more lamps of excitation illuminator, the first group of main ballast that provides by the electric power of main power source supply that is used for to described one or more lamps is provided described illuminator, and second group of standby ballast that provides by the electric power of stand-by power supply supply to described one or more lamps is provided, described method comprises:
Release is by the energy of the storage of the stored energy assembly in the described standby ballast;
Encourage output switch circuit with the energy that is discharging, the output switch circuit of described excitation is connected to described main power source described first group of one or more lamps; And
Make described output switch circuit de-energisation when described stored energy assembly is discharged, described currentless output switch circuit is connected to described stand-by power supply described second group of one or more lamps.
10. method as claimed in claim 9 also comprises: described output switch circuit is remained in the de-energized state, become available up to described main power source.
11. method as claimed in claim 9, also comprise: enable lamp drive circuit, the described lamp drive circuit of enabling receives electric power from alternative power source, and described currentless switch is connected to described alternative power source via described lamp drive circuit described second group of one or more lamps.
12. method as claimed in claim 9, wherein, described excitation comprises uses the energy that is discharging to encourage about 100 milliseconds to 200 milliseconds of output switch, and the output switch of described excitation is connected to described main power source described first group of one or more lamps.
13. method as claimed in claim 9, wherein, described first group of lamp comprises first lamp, and described second group of lamp comprises described first lamp and second lamp.
14. method as claimed in claim 9, wherein, described stored energy assembly is a capacitor, and described energy discharges by the resistor with described capacitors in series.
15. method as claimed in claim 9, wherein, described stored energy assembly is a storage battery.
16. a ballast system that is used for providing to lamp electric power, described ballast system comprises:
Main ballast is used for being connected to main power source and providing electric power from described main power source to described lamp during by the excitation of described main power source in operation when described main ballast; And
Standby ballast is used for providing electric power from stand-by power supply to described lamp when described main ballast during not by described main power source excitation, and described standby ballast comprises:
Lamp drive circuit, be used for when described lamp drive circuit be activated and described lamp when in operation, being connected to described lamp and driving to the electric power of described lamp supply from described stand-by power supply;
Rectifier is suitable for being connected to described main power source, and to be used for receiving alternating electromotive force from described main power source, wherein, when when described main power source receives described electric power, described rectifier is transformed into direct current power with described alternating electromotive force;
Input switching circuit, be suitable for being connected to described main power source, described input switching circuit is connected to described rectifier, to be used to receive direct current power from described rectifier, wherein, when described input switching circuit is receiving direct current power from described rectifier, described input switching circuit will be transmitted to described main ballast from the electric power of described main power source, and wherein when described input switching circuit is not receiving direct current power from described rectifier, described input switching circuit is enabled described lamp drive circuit;
Output switch circuit is used for that when described output switch circuit is energized described lamp is connected to described lamp and drives, and is used for when described output switch circuit is de-energized described lamp is connected to described main ballast; And
Delay circuit, be connected to described rectifier, to be used for receiving direct current power from described rectifier, and be connected to described output switch circuit, wherein, when described delay circuit when described rectifier receives direct current power, described delay circuit encourages described output switch circuit, and be used for for the described output switch circuit of section continuation excitation time of delay, described delay circuit receives direct current power from described rectifier during described time of delay section, and wherein when described time of delay section stop and described delay circuit during not from described rectifier received current electric power, described output switch circuit is de-energized.
17. lamp ballast as claimed in claim 16 is wherein described when described main ballast is encouraged by described main power source, described main ballast stored energy, and the energy of wherein being stored was released during the section in described time of delay.
18. lamp ballast as claimed in claim 16, wherein, described input switching circuit and the series connection of described output switch circuit.
19. lamp ballast as claimed in claim 16, wherein, described output switch circuit is connected with described delay circuit, and the described output switch circuit and the described delay circuit of series connection are in parallel with described input switching circuit.
20. lamp ballast as claimed in claim 16, wherein, described delay circuit comprises diode, capacitor and resistor, and described diode is connected with described resistor, and described capacitor and described resistor in series.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/165169 | 2008-06-30 | ||
| US12/165,169 US7880391B2 (en) | 2008-06-30 | 2008-06-30 | False failure prevention circuit in emergency ballast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101621213A true CN101621213A (en) | 2010-01-06 |
| CN101621213B CN101621213B (en) | 2014-01-29 |
Family
ID=41119653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910159433.0A Expired - Fee Related CN101621213B (en) | 2008-06-30 | 2009-06-30 | False failure prevention circuit in emergency ballast |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7880391B2 (en) |
| EP (1) | EP2141967A3 (en) |
| KR (2) | KR101676869B1 (en) |
| CN (1) | CN101621213B (en) |
| CA (1) | CA2659976C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103957651A (en) * | 2014-05-06 | 2014-07-30 | 复旦大学 | High-frequency HID electronic ballast with self-adaptation circuit and application thereof |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8004198B2 (en) * | 2009-05-28 | 2011-08-23 | Osram Sylvania Inc. | Resetting an electronic ballast in the event of fault |
| US8629574B2 (en) * | 2009-08-18 | 2014-01-14 | Cooper Technologies Company | Ballast for fluorescent emergency lighting |
| US9472955B2 (en) * | 2009-08-19 | 2016-10-18 | Keene Jones | Emergency light and charger system |
| US9954390B2 (en) * | 2012-05-30 | 2018-04-24 | Fulham Co., Ltd. | Ballast with battery backup |
| TW201417630A (en) * | 2012-10-26 | 2014-05-01 | Lextar Electronics Corp | Illumination system |
| CN103501571B (en) * | 2013-05-15 | 2018-12-25 | 日照鲁光电子科技有限公司 | The great-power electronic ballast permanently used |
| GB2541470B (en) * | 2015-08-19 | 2021-08-25 | Tridonic Gmbh & Co Kg | Controlled mains changeover in an emergency LED converter |
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| US5004953A (en) * | 1989-06-30 | 1991-04-02 | The Bodine Company | Emergency lighting ballast for compact fluorescent lamps with integral starters |
| GB9215808D0 (en) * | 1992-07-24 | 1992-09-09 | Jsb Electrical Limited | An improved lamp fitting |
| US5811938A (en) * | 1995-06-01 | 1998-09-22 | The Bodine Company, Inc. | Emergency lighting ballast for starting and operating two compact fluorescent lamps with integral starter |
| DE19520999A1 (en) * | 1995-06-08 | 1996-12-12 | Siemens Ag | Circuit arrangement for filament preheating of fluorescent lamps |
| US6107744A (en) * | 1995-11-29 | 2000-08-22 | Bavaro; Joseph P. | Back-up electrical systems |
| DE19708792A1 (en) * | 1997-03-04 | 1998-09-10 | Tridonic Bauelemente | Method and device for detecting the rectification effect occurring in a gas discharge lamp |
| US6049178A (en) * | 1999-01-19 | 2000-04-11 | Sheu; Tyng-Jeng | Circuit for controlling operation of an emergency exit lamp |
| US6339296B1 (en) * | 1999-05-11 | 2002-01-15 | Jerzy M. Goral | Low profile emergency ballast |
| DE19923945A1 (en) * | 1999-05-25 | 2000-12-28 | Tridonic Bauelemente | Electronic ballast for at least one low-pressure discharge lamp |
| JP3304944B2 (en) * | 2000-02-07 | 2002-07-22 | 株式会社ニプロン | Uninterruptible switching regulator |
| US6753651B1 (en) * | 2002-05-01 | 2004-06-22 | The Bodine Company, Inc. | Emergency ballast with battery heater |
| JP4396132B2 (en) * | 2003-05-07 | 2010-01-13 | パナソニック電工株式会社 | Lighting device |
| DE10345610A1 (en) * | 2003-09-29 | 2005-05-12 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Method for operating at least one low-pressure discharge lamp |
| US7084579B2 (en) * | 2004-12-13 | 2006-08-01 | Osram Sylvania Inc. | Two light level ballast |
| US7187132B2 (en) * | 2004-12-27 | 2007-03-06 | Osram Sylvania, Inc. | Ballast with filament heating control circuit |
| US7218063B2 (en) * | 2005-05-27 | 2007-05-15 | Osram Sylvania, Inc. | Two light level ballast |
| JP2007223471A (en) | 2006-02-23 | 2007-09-06 | Toyota Motor Corp | Vehicular power supply control device |
-
2008
- 2008-06-30 US US12/165,169 patent/US7880391B2/en active Active
-
2009
- 2009-03-25 CA CA2659976A patent/CA2659976C/en active Active
- 2009-06-09 KR KR1020090050894A patent/KR101676869B1/en active IP Right Grant
- 2009-06-26 EP EP09008376.7A patent/EP2141967A3/en not_active Withdrawn
- 2009-06-30 CN CN200910159433.0A patent/CN101621213B/en not_active Expired - Fee Related
-
2016
- 2016-06-01 KR KR1020160068262A patent/KR20160086294A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103957651A (en) * | 2014-05-06 | 2014-07-30 | 复旦大学 | High-frequency HID electronic ballast with self-adaptation circuit and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| US20090322228A1 (en) | 2009-12-31 |
| CA2659976A1 (en) | 2009-12-30 |
| EP2141967A3 (en) | 2014-12-17 |
| CA2659976C (en) | 2017-01-31 |
| EP2141967A2 (en) | 2010-01-06 |
| KR101676869B1 (en) | 2016-11-17 |
| KR20100003202A (en) | 2010-01-07 |
| CN101621213B (en) | 2014-01-29 |
| KR20160086294A (en) | 2016-07-19 |
| US7880391B2 (en) | 2011-02-01 |
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